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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2c696feb4b2fdef294fe9ce85ab99b72f0dda07ff6ca2f0fd5ab5dd7f463e3b3' 
  AND token = 'ailF0rYIJzSNVnAQxZiWr7aJTQDNgapStQPxsOmnP9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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