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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b10aab37979d7d144cac96a166a300f19aa397c4e77551c0e83111814e61b240' 
  AND token = 'XkIhW04KZA5mVD+aPDcO1a52hspW820C6Ho0LqoQTcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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