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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '02ad8591c72bb42ce0798a92c4b88acb8f5ea81a5ba1644594183063ede332c5' 
  AND token = 'Tgo787vRsybwLecoozfmr/RnZ4dUE1CDX9r7wqU5og4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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