Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a3ff2f20c9c4b8ecc2af12e5f548fce37ab0621127fc542a74f0007a0a053fe' 
  AND token = 'UPctYE/F26NJQaNllVy+XL2EOfOAd8cVQ5SHISOcPgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}