SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70e214905d306fa8b0ad123afd18f7bc4f71e1737263d370e7a209fcb3f3e160' 
  AND token = '7/y/v7fon5pPhJJ/0ccsKiU+Q/MznVxLO7xYG4qBHc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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