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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '464ac176f8fa50917c894e61c339639a1fe3dbd430c2b2beecadc6158a793d07' 
  AND token = 'THZk7uLjCejv/8oaFNiGkh59akllVLC2Q4Kx3ZwA7mU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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