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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f34e7ff8909a360fa42ef5a2382f4d31f48521e2248b6a04bcbc47b73073d3fa' 
  AND token = 'TD9/cxQoi5FZ/kiVfVhW8Ke5+CbZW5lf1rsSLHS8qPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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