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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '190b4e02981ec1e77de0bbb91286f4afc6b7c09e3725cdf8c199cf5c24141aa4' 
  AND token = 'PKnNF7iB9TLiUKnkHBJtZYoaCOSNTK9QRv4quPFletM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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