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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9beecc365fc7725320bd6c9d7707e0b141e58b5aeead1d84d1e03bcc985bcbb7' 
  AND token = 'D2DxxwOTtyJz5zpSfhKYkj32uAz79FF+59a/O+wXFxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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