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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b6a781b42e3e8f47377c3af5edad58bad4b1cf584f908374e578ca87e216757' 
  AND token = 'Ye8Fmoy/z6wtl05WVB3KXQ1Q7dX51Aq8OJgbD7wgzB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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