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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9e1d154b6efbf51ef9b0faa37bdab2870b214285656fbc08690a8f0954aec85' 
  AND token = 'F5ndPX9YJ9yQ1ZK9cej8uCLk4tgphccOs8GAiukY5f0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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