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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ba1dc77249b7c5b070702cf1f410765131e52b1006a2bcabc755a7a88dd7e98' 
  AND token = 'Cz3jFPH8l/uyv4uHjsvfNtRRkO/T6Bp7dVRf8/N5gQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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