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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f60aec9d54fcd790b6ca27066c5cffab2727ad20778d9e2fee8d8a4f9193d4fc' 
  AND token = '+HIvaqETf6LdmAeeOs0io6G00XQvfnYtmsddfP8uJ/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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