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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb1784c5fbe56eccb5d688fa5872b542f0ea9d712c6ec7ac4d1fc161a587b780' 
  AND token = 'Iljgwr5WvR7cBAb7T5FPpB0V2kyw28z6NlHf9Cf1kbs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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