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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09bf418cf8d54e331a3d3edb7d1ed1adc6dc5ee4ef1ea2ca47a18b30097dfa6b' 
  AND token = 'nLD8UtBZyTkMWq8APBvXov1RBbXmXMx0zdYC8DC69fs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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