Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2f4d8e16bc11f197a0f298d5c315f525c3a5711f80ab858e47ce4a03cd19f2e' 
  AND token = 'P0pJb2l8GdTxzpJSp1u4NECJC1bcsrmc2GS04XDXrIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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