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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '753235e1407ce86e535071f41161b8f9b6aa5559b06e4bd5d14602b7ccc1d691' 
  AND token = 'vaTl5TKAlqqgCPz3F7Jws6X4FioS4mXRVWYLoQ1fFj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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