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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85f5bcc20f5bd33391c712d00d8bde2b0afb06543ab69ff3f33bbe52a0f85a1e' 
  AND token = 'GJqob2VsC1L20g6Ud98rMcnK0hAUI70aVt5mZepjmvw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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