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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd63dc246434f01ef0b2d99cff1ac3ed6be0767c42eb483dbc76975cb36ff6c0e' 
  AND token = 'AWn2EUbTbjYLgCDJIbuq0j2cNOlQwaCuX9Dx0xt7ePM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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