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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6fc05398fea57ccf2d768dcc87b0825bf593f42358806beb9c2490f531d4715' 
  AND token = 'Hf58PqzXZ8NF5nro+SHkq9FuIIUjgp7oM8fHfpZVTy8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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