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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10d55db215d49c5a2e44bd6095c8d3a34d5ad94f7304135d0e158277e6fff731' 
  AND token = 'ayU0xkHrhMyCqFr6bAJ0xAB0IjomUdM4OvNf8T3cFnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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