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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57ed65a7e722d66af31c49365bbaaebe4126b77f6e408b1df61a472f0e093cfd' 
  AND token = '/m6OJsXB4EO6Nxf8QottOqFvLpTJdJlPRRj4dPlmPuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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