Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee0021fa0a5474c20c1099cc616e38a1d0b0fc6ada6ed2a96f759921ece8a0d3' 
  AND token = 'j1MYh1bQ0ClDpqP+OKTTrL1u5oKLwd7BsoT4T1VzSRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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