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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ba7145f74f0d18d3cc7d39487aaed2d22ab94ddf517b576ae7be175d3058fe1e' 
  AND token = 'p3Gqo1vSvy3gfduT4iIZPCUDC3v2zMLao4O61HXbhfo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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