Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b29580ba2ea3008d25f178bebdf91b85b42a2f20167a8d6e811dd44a03d37df' 
  AND token = 'j4PkT54S9NFTKiccjDMTfZs0DYJHVQPfR1tEa86XJjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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