Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8275289354137b392f78593a7781bc6bf00b1c2e0a8136b254080517c0c38d5' 
  AND token = 'zat/v5LUu7YgopA0oB83exqB9nGCp2uqPCrdh0hNuyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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