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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '283e565fcd8b15b0a664676e8535dda102005af0a9287c48e6337ccf88f829ce' 
  AND token = 'OJW9245R4DHB74zDalwFaUuNcp29jBmu6vVnhrteYgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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