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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ae7b728676e34475ae1ee819400583506dd9c04d5da428c1071a93f54b002bff' 
  AND token = 'KnPBE/xIbV8TlcE+h+d90+etHeHRsIu+aTN4/uf3U4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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