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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64b016a578991f8738641e841d19700faaa93502b8e044010f465a37ad0cdbd1' 
  AND token = '2Z/AE2JF4RCe+R1s+IoOao0577m/lPxXeLg9/WjHCVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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