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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ea06c5078f1170b14a330a96b3b413c45c29ac8a6e64407060a6ba5c8329783' 
  AND token = '5ZST+lkB1eYbjrWCV0ESgHrEGLAhLTI4UyeV7uNCWUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}