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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '241087c031f39c35232d22a54d9b8fa324fc0f7311c3a0b9f39812cc80333cd5' 
  AND token = 'zXZ/IeUyZ2R5ylCNv5375TmLpLRJjN5b5jTiIXtklHg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.06792

JSON explain

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