SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b142d928966d9f5cfbf6d5d3e98f8ae5b67ab76856d596747a38473d0d51d750' 
  AND token = 'jymXEWAloq2+TIGwpl6f0yEfg19VZ5UV8R2yXpB3tQY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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