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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07ed440a52bfac1bdb116f5acf6561706e30c067902efc4b9b5fd88f18b0cb7b' 
  AND token = 'GW1UJRojzNY2yj2s/JK85Xw9DbrqIr09tUdjHmo66pk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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