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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae5b1b0f5d596d21733ee9ce5ba0769233df5a83657874e834c38903a4d36b85' 
  AND token = 'jAMN35Ko05TJGEO6mISi/jrzRr+7Miu89a/Qjarrjlg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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