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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a4d7dd1a15994f96ead980299f980b395b7504ea9e7f385cbe4134fc99e7bcb5' 
  AND token = 'VAZ87frDy15ZBJQuFm638XU7151nlp7ZdY2ypukSaBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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