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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ee87670af0fdc4900bb960c24433903b93deb7473b45ecc54776e869b4a208d' 
  AND token = 'XaAFtfHp7xX1K9o3R4N7zUM0YbsJecuEcZp6sAjNLE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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