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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8dddbc05400f5e5b0b7a3102fdbb394f48ece6caffbd22501d2e4ec24900f03c' 
  AND token = '06v0AMSmIaQMLHbCbP3LV7E6Xym8fnVZIoaIJZtjmAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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