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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35c9115e51a78475df15d87ee4054bfce7b3c268ce0202157058bdc3f5a4b916' 
  AND token = '1bQPa3zMKWo4u6D1rcoA1DHAaS15VzZGfKWCDdEPEFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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