Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd736ecee19416e75287dbcad6ced83c1cbe6e0ead492a1bacc93ec5466d211f1' 
  AND token = 'bcS5ER5meltFpYTalM28Ch4Bu17qS4vuQlCXIqsasxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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