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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd462d7cae4d4ef6c7365792b60053efa364481bf312afbc91d02b445b91f7e0' 
  AND token = 'ipwaAsp7Shy6W3wPcTSEXVW7Be3f2U0Oz1cYD2VheR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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