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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e77c7ab68ae25d74bf8d91fa55fbcd4e17c2c9555e899f21185093482b26b6c0' 
  AND token = '5D+7gpib88x+oimUX81Ee7/SJevmDA3OWHXTudZ1ZKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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