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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1d6a711b02ff48f343666352dffdc729e5ac1e3e896be4e102527305057a3404' 
  AND token = 'pwtScrHiC/0/Z62I+E2PbuX2ge5LntumAgQrppEfmWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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