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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '01b179271c8c5e4d37cf522f9e2d42cd2e2a7cd2fdce99eff4bbe695d5a141c7' 
  AND token = 'NZiWU+IV5Z2RwSxy4cEy6CC3rKMU5Vl6ONLohz3nf3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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