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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a7ea2df8fc331c74c1848887d3c073674578e1332aa44afd01d4c00405c8f98' 
  AND token = '06wKevSmz7/fE/0IG5JzqImCeefN58207D60yblEXmk=' 
  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"
    }
  }
}