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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56a06dd40e73b32a60bef1dd616ac3f6597c7d2cd8080da18c5ec22ec1848f80' 
  AND token = 'pnVXZEUN8ZePsYU0Exz/rHsEBRNuCzPLTv4SEsMgTd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}