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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd74a2d8b5f275f61e5558b7c4e33d6933197dc4eca2bbe7dc1182aef7f2a138b' 
  AND token = 'RzVRvTyYs96O1yBm6d4KRc7t657M/czvl/p2twjKpy4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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