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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f491b658fb8c73434d008a79d02fe093e7edd82daa11ebe7d47495d820290375' 
  AND token = 'OqSEOzvGgP7Z1SlKLIg0dd9VeKyfMAs9Fr7vcdKjt+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00072

JSON explain

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