Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26e38898010b803402dfcd62bb29b590779e6f7f6432f794d7182ebb5a3d2407' 
  AND token = 'eD/HLtKAJ22pGFtieLbL9HRMqqTuJmNS3Zw+qFAcyQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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