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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f61994ac9d0a3b070a56567a81a60f4167032dcd5e694247036c24f012af367' 
  AND token = 'WsQ6Lwl14pESPX1DH+N+YP78ssoRhfX2ri7hCfHluTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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