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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ee140315c47c8d4da438eef468cf15d9b0eb679e08db9e56ded6c2bb6883a3e' 
  AND token = 'B7OEUiZ/4ikRt0/NROA6+LVRMUzEfEaf3tsNXa+RYC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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