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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23614bde82a5d195765c2637b65c67b827ffed8ac84b24ee37d2a8acd6cd076a' 
  AND token = 'fuk5OeBccjRB0vxS8Q0XoPiEyI9G3No5l+lLNfm63V0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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