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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e0074b84f4b1935938be001c10e9f3e3599c84d574ecfa1dec2fd43b161e535' 
  AND token = '+Q34c/3nIPG1IWUqa/b32UzHt0mJRB8cWulIRVt9chs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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