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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd554cf7d70b265d93d569100c2c23982849dc64bec2fea0bd64086219afa8881' 
  AND token = 'GLjDdMfCkXAX/ZnUBDGUxc5g+3vcZz5WnT0fUtoibas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}