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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0eada02e13d79a4edb39fe70de27c74be905328a13a3c6306318dd1988feeab1' 
  AND token = 'H/Rlyofmu6dKsEynsvixIkshwC8lYm6KAogJV4kzOug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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