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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ecbde63d7209a6133c26681acb9aabf97fcb177cc64cbbf472d2057497607a69' 
  AND token = 'WZpm/4p49rmdQ/J5SS9mYgNH1JMgOa4uIjqn7ow1Q8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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