SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0995bc0364cda14f3331813e1c0362eff2e6a8c7840f5082bf5a5917dc18c6a1' 
  AND token = 'Y05XTCevIwtVigjBeSFzC9F+U/F+5njhX42ZZUPIq7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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