Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f56089f6f911f33291ecea0878bca811c1ebccc01289c9bfcc12307ef3ac9c5' 
  AND token = '/PKQu0F80J0ikSf8l5BsbcVHazPVkjLyWVep2wz8O6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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